LOW AND MEDIUM ENERGY BEAM TRANSPORT UPGRADE AT BNL 200 MEV LINAC

The BNL 200 MeV linac has been under operation since 1972 and gone through several changes during its 38 year lifetime. The latest reconfiguration in low and medium energy (35 and 750 keV) beam transport lines results in about a factor of 2 reduction in the transverse emittance for the accelerated polarized proton beam, and for the un-polarized high current H - beam a several-fold reduction in the radiation levels due to beam losses throughout the linac and isotope production facility complex, with more beam current on the isotope production target. These improvements are achieved by proper matching into the linac in longitudinal as well as transverse phase spaces [1].